Expansible tool for cleaning combustion-cylinders.



W. MOISTER. EXPANSIBLE TOOL FOR CLEANING COMBUSTION CYLINDERS.

APPLICATION FILED MAR. II. 1917-.

Patented May 2 2, 1917.

UNITED STATES PATENT oEEIoE.

WILLIAM MOISTER, OF CORONA, NEW YORK, ASSIGNOR TO BREWSTER & (30., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

EXPANSIBLE TOOL FOR CLEANING COMBUSTION-CYLINDERS.

Specification of Letters Patent.

Patented May 22, 191 '7.

Application filed March 17, 1917. Serial No. 155,569.

Cleaning Combustion-Cylinders; and I do declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to certain new and useful improvements in carbon scraping tools, and more particularly to a tool or device especially adapted for. removing the carbon from the compression chambers of internal combustion engines.

The invention has for an object to provide a tool by which the carbon deposits may be removed from the combustion chambers without removing the engine heads, and it consists in an expansible tool adapted to be contracted for introduction through the usual spark plug opening in the cylinder head and subsequently opened one):-

panded into operative position and then erence being had to the accompanying drawing wherein- Figure 1 is a side elevation of the improved tool or device, part being broken away;

Fig. 2 is an elevation of the tool in open position looking at right angles to the view point of Fig. 1;

Fig. 3 is an end elevation of the tool in which the knives or scraping blades are closed; and

Fig. 4 is a fragmentary longitudinal section of the tool showing the blades inoperative.

-Referring more in detail to the drawing, the numeral 1 designates a tubular shaft in which is slidably mounted an operating rod 2, one end of the tubular shaft being exteriorly threaded as at 3 and the opposite end provided with a slot 4 extending inwardly from said end a suflicient distance to receive the blades 5, as depicted in Fig. 4.

The scraping blades 5 are pivotally mounted at the outer end of the slot 4 by pin 6 and have their outer ends 7 and outer edges 8 suitably shaped so as to readily remove carbon deposits, and the general design and shape of these blades may, of course, be varied to suit the occasion.

One end of the operating rod 2 extends into the slot 4 and is provided with a reduced part 9 to each side of which is pivoted a link 10, one of said links being connected to one scraping or knife blade 5 and the other link connected to the other blade in a pivotal manner. Thus, when the operating rod is pushed through the tubular or hollow shaft, the scraping. blades will be extended in a lateral direction, as depicted in "Fig. 2, the links 10 being divergently interrelated. When the rod is retracted the links assume substantially a superposed relation within the slot 4 and swing the blades into the latter and within the body lines of the shaft 1, the inward or retracted movement of the operating rod being defined by a transversely extending pin 11 carried by said rod forabutting the inner wall 12 of the slot 4. A nut or head 13 is mounted on the opposite end of the hollow shaft for longitudinal movement thereon and is. formed with an internal shoulder 14 of annular formation through which the adjacent end of the operating rod extends. The outer end of the nut is socketed, as at 15, into which socket the operating rod extends to receive a collar 16, the latter being fixed on the rod by a pin 17 The socketed end of the nut is provided in its walls with diametrically opposite openings to receive an operating handle 18, said handle extending across thesocket 15 in contacting or abutting relation with the collar to hold the latter seated on the internal shoulder 14.

In operation, with the blades in their folded relation, as shown in Figs. 3 and 4, the tool is inserted through the spark plug opening of the cylinder, which opening is usually in the head of the cylinder, and after insertion the nut 13 is rotated on shaft 1 to advance the operating rod and thereby effect a spreading or unfolding of the blades into operative position. The spreading position of the blades is determined by the internal shoulder 14 engaging the adjacent end of the hollow shaft, and if it is desired to jam the nut to prevent accidental 'unscrewing thereof a wrench may be engaged with the wrench holds or faces 19, provided on the shaft, and a tool applied to the nut in an obvious manner.

After the carbon has been removed the nut is backed off the shaft'to fold the blades and permit of the tool being removed through the spark plug opening.

It is apparent that, with the tool embodying the present invention, the carbon deposit may readily, easily and quickly be removed from an engine cylinder simply by removing the spark plug, inserting the folded tool through the spark plug opening and manipulating it by means of the handle 18; Thus the labor of taking off the head of the cylinder is avoided and the carbon removing operation rendered easier and the cost considerably lessened.

What is claimed is:

IJA carbon scraping tool comprising a tubular shaft, an operating rod slidably disposed therein, one end of the shaft being slotted and the opposite end screw threaded, a pair of scraping blades pivoted in the slotted ends of the shaft for folding into the slot, a pair of links pivotally eonnectii'ig the operating rod to the blades, a transversely extending pin carried by the operating rod for abutting the inner wall of the slot to limit the folding movement of said blades, a nut threaded on the opposite end of the shaft and provided with an internal annular shoulder through which the operating rod extends, a collar fixed on the protruding end of the rod and seating on the shoulder, said nut being provided with an outer socketed end in which the collar seats and the walls of said socketed end provided with diametrically opposite openings, and a handle extending transversely of the nut through the openings'of the latter and in abutting relation with the collar.

2. A carbon scraping tool comprising a tubular shaft having one end slotted and the opposite end screw threaded, an operating rod slidable in the shaft and projecting into the slot" thereof, a plurality of scraping blades pivoted in'the slot for folding therein, links connecting the blades to the rod, a nut threaded on the opposite end'of the shaft having an internal shoulder through which the rod extends, a collar fixed on the extended end of the rod and seating on the shoulder, and a removable handle extending transversely through the nut and holding the collar seatedon the'nut shoulder.

3. A carbon scraping tool comprisin a tubular shaft having one end slotted, an operating rod slidable in thevshaft, a pair of scraping blades pivoted in the slotted end of the shaft for folding into the slot, apair'of links pivotally connecting the operatingrod to :the blades, and a sleevelike operating head movable longitudinally over the opposite end of the shaft and provided with an inwardly extending annular shoulder through which the operating rod extends,

' said shoulder being movable toward and away fromtheachacent end of the shaft and connected to the rod for moving lengthwise in unison with the latter.

4. A carbon scraping tool comprising a tubular shaft having one end slotted and the opposite end screw threaded, an operating rod slidable in the shaft and projecting into the slot thereof, a plurality of scraping blades pivoted in the slot for folding therein, links connecting the blades to the rod, a

nut threaded on the opposite end of the shaft and'secured to said rod whereby the advancing and retracting of the nut will effect the movements of the rod to open and fold said v the blade intermediate its ends whereby the free end may be used for scraping, said blades and connections being foldable with in the slot of the shaft.

In testimony whereof I afiix my signature in presence of two witnesses.

WILLIAM MOISTER.

Witnesses FRANK C. CHAPMAN, WILLIAM J. MAHER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

